Remove old webui History page on desktop and mobile

ios/chrome/browser/chrome_url_constants.h

Index: ios/chrome/browser/chrome_url_constants.h
diff --git a/ios/chrome/browser/chrome_url_constants.h b/ios/chrome/browser/chrome_url_constants.h
index 5f44832fa23cfa439664a393c0bc0e0e81bd1fc3..95c5511e82372fa74f28b3af79ce42007b876ad2 100644
--- a/ios/chrome/browser/chrome_url_constants.h
+++ b/ios/chrome/browser/chrome_url_constants.h
@@ -46,7 +46,6 @@ extern const char kChromeUIExternalFileHost[];
 extern const char kChromeUIFlagsHost[];
 extern const char kChromeUIGCMInternalsHost[];
 extern const char kChromeUIHistogramHost[];
-extern const char kChromeUIHistoryFrameHost[];
 extern const char kChromeUIHistoryHost[];
 extern const char kChromeUINetExportHost[];
 extern const char kChromeUINewTabHost[];
@@ -98,7 +97,7 @@ extern const char kClearBrowsingDataMyActivityUrlInFooterURL[];
 extern const char kClearBrowsingDataMyActivityUrlInDialogURL[];
 
 // Google history URL for the header notifying the user of other forms of
-// browsing history on the hisory page.
+// browsing history on the history page.
 extern const char kHistoryMyActivityURL[];
 
 // Google history URL for the Clear Browsing Data under Privacy Options.